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Smart Card Protection by the Use of Dynamic Signature Verification One-Way Codes Disclosure Number: IPCOM000062868D
Original Publication Date: 1985-Jan-01
Included in the Prior Art Database: 2005-Feb-18

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Worthington, TK [+details]


Any technique which uses secrecy of an algorithm for the protection of smart cards is unlikely to succeed because it must be assumed that unauthorized users will understand the technology behind the smart card. It must also be assumed that the unauthorized user can obtain point-of-sale terminals (PST) for study and practice. Dynamic signature verification and One-Way codes can be used to prevent the unauthorized use, duplication and manufacture of smart cards. The smart card would contain the authorized user's reference signature, and the PST would contain the pen and verification algorithm. When the user wanted to purchase something with his smart card, the PST would request a signature and compare it to the reference on the card. If this signature was accepted, the transaction would be authorized.